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I'm trying to understand vyper constructor usage patterns. When compiling the example Vyper erc20 contract, the output (deployed) bytecode looks like this:
The second opcode
In Solidity, a comparable example would not include
Let me know if I'm misunderstanding!
Hi @jacqueswww - this is precisely why I'm asking. According to the yellow paper, contract creation transactions come with empty calldata:
In section "Contract Creation", the specific environment set-up is listed here (note that
The Solidity convention is to embed constructor arguments as part of the original bytecode that gets passed during contract creation (
Has Vyper adopted a different convention where the contract call assumes constructor arguments are passed during the contract creation phase?
@Pet3ris I don't think we use anything different, also you can check our tests also show we use standard web3 to deploy and test init.
given example program:
val: public(uint256) @public def __init__(a: uint256): self.val = a
Check the IR output (-if ir):
Seems to be in order ? ( I realise I answered incorrectly about calldata copying at first, sorry!).
@Pet3ris No problem! Great catch! So I just did a fix:
Looks much better :) (calldata load for the function), nothing for the init.